Citizen Men's BV1010-56L Eco-Drive Dress Stainless Steel Watch Light powered Eco-Drive Caliber B690 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 300 days; Low charge warning: 7 days; Quick start ability; Charge time from stop state to max charge: Incandescent Light - 230 hrs, Outdoors, Cloudy (10,000 Lux) - 70 hrs, Outdoors, Sunny (100,000 Lux) - 10 hrs Durable, hardened mineral crystal; Case diameter: 37 mm Stainless-steel case; Dark-blue dial; Date function Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion